Air bag

• US 5,302,432 A
• Filed: 05/26/1992
• Issued: 04/12/1994
• Est. Priority Date: 08/16/1990
• Status: Expired due to Term

• Current Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
• Original Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
• Inventors: Kimoto, Katsuyoshi, Shigeta, Seizaburo
• Primary Examiner(s): Bell, James J.
• Application Number:
  US07/847,044
• Time in Patent Office: 686 Days
• Field of Search: 428/246, 428/252, 428/287, 428/284, 428/36.1, 428/102, 428/192, 428/193, 280/728
• US Class Current: 428/36.1
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2262/0276 Polyester fibres
• CPC Class Codes: B32B 2262/062 Cellulose fibres, e.g. cotton
• CPC Class Codes: B32B 2571/00 Protective equipment
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 5/024 Woven fabric
• CPC Class Codes: B60R 21/235 characterised by their material
• CPC Class Codes: Y10T 428/1362 Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
• CPC Class Codes: Y10T 428/24033 including stitching and discrete fastener[s], coating or bond
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24785 including layer embodying mechanically interengaged strands, strand portions or strand-like strips [e.g., weave, knit, etc.]
• CPC Class Codes: Y10T 442/3813 Coating or impregnation contains synthetic polymeric material

Abstract

An airbag (1) constituted by using a laminated cloth comprising a woven fabric (2a) of synthetic fiber multifilaments, a film (3) of a polyolefin group resin laminated on a side of the woven fabric (2a) and a nonwoven fabric (4) laminated on the film (3). The laminated cloth has a weight per unit area of 280 g/m² or less and an air permeability of 2 cc/cm² or less. The air bag having the constitution in accordance with the present invention has synthetically superior characteristics as an air bag for a driver'"'"'s seat, a passenger'"'"'s seat, or others, in a vehicle.

Claims

1. An air bag for forming an internal space for accommodating an inflated gas for expanding the air bag, comprising:

a laminated cloth forming at least a portion of the air bag;

said laminated cloth comprising a woven fabric of synthetic fiber multifilament, a film of polyolefin group resin laminated on said woven fabric, and a nonwoven fabric laminated on said film;

said film being closely bonded to and integrated with a surface of the woven fabric and a surface of the nonwoven fabric by a molten portion of said film which solidifies upon cooling such that an air permeability of the laminated cloth becomes 2 cc/cm² /min or less; and

said laminated cloth having a weight per unit area of 280 g/m² or less.

2. An air bag according to claim 1, wherein said laminated cloth is used for a whole portion of the air bag and a vent hole is provided in the laminated cloth.

3. An air bag according to claim 1, wherein said laminated cloth is used for at least one portion of the air bag and a woven fabric of synthetic fiber multifilaments is used for another portion of the air bag, said portions being sewn together.

4. An air bag according to claim 3, wherein said nonwoven fabric of the laminated cloth comprises the outermost layer of the laminated cloth.

5. An air bag according to claim 1, wherein said woven fabric portion of the laminated cloth is comprised of multifilaments of a polyamide group.

6. An air bag according to claim 1, wherein said woven fabric portion of the laminated cloth is comprised of multifilament of a polyester group.

7. An air bag according to claim 1, wherein said nonwoven fabric portion of the laminated cloth is comprised of a polyamide fiber.

8. An air bag according to claim 1, wherein said nonwoven fabric portion of the laminated cloth is comprised of a polyester fiber.

9. An air bag according to claim 1, wherein said nonwoven fabric portion of the laminated cloth is comprised of a regenerated cellulose fiber.

10. An air bag according to claim 1, wherein said film of the polyolefin group resin is formed by inserting a molten polyolefin group resin having a sheet-like shape between the woven fabric and the nonwoven fabric and laminating same together.

11. An air bag for forming an internal space for accommodating an inflated gas for expanding the air bag, comprising:

a laminated cloth forming at least a portion of the air bag;

said laminated cloth comprising a woven fabric of synthetic fiber multifilament, and a film of polyolefin group resin laminated on said woven fabric;

said film being closely bonded to and integrated with a surface of the woven fabric by a molten portion of said film which solidifies upon cooling such that an air permeability of the laminated cloth becomes 2 cc/cm² /min or less; and

said laminated cloth having a weight per unit area of 265 g/m² or less.

12. An air bag according to claim 11, wherein said laminated cloth is used for a whole portion of the air bag and a vent hole is provided in the laminated cloth.

13. An air bag according to claim 11, wherein said laminated cloth is used for at least one portion of the air bag and a woven fabric of synthetic fiber multifilaments is used for another portion of the air bag, said portions being sewn together.

14. An air bag according to claim 11, wherein said woven fabric portion of the laminated cloth is comprised of a multifilament of a polyester group.